To prevent water pollution in Japan's public water areas, the discharge of the organophosphate compounds parathion, methyl parathion, EPN, and methyl demeton from factories into public water areas is regulated using control standards.


New Effluent Standards and Analytical Methods 161-165
Edited by Japan Society for Environmental Chemistry (Supervised by Water Pollution Control Division, Water Quality Bureau, Environmental Agency)

Chromatogram of Standards (each 1 ppm)

Gas Chromatograph

Gas Chromatograph

This separation/analysis instrument is widely used for the quantitative analysis of chemical substances. It is used with a detector and column combination that suits the analysis target components. Highly sensitive measurements are possible using the flame photometric detector (FPD), which is selective for phosphorous compounds.